Drive for conveyers.



ATMTEB NG. u., 1906.'

APPLGATIDN FILLED NOT. 17, 1903 I 2 SHEETS-SHEET I.

' 1.5501111111, J1. an E. E. HBRSH.

ERIVB F011 GONVBYBRS.

APPLICATION FILED NOV. 17, 1903.

ZSHEETS-SHEEY 2.

A Vv

@f4 au f arrangement of parts having the mode of o eration' substantially as 'UNITED ASTATES V'PATENT OFFIOE.

THOMAS ROBINS, AND EDGAR E. HEEsnOF NEW YORK, N. Y.,v

AssieNORs TO RoBrNs ooNvEYTNG BELT COMPANY, OF NEWl YORK, N. Y., A OORPORATTON OF NEvir JEesEY.

DRIVE Fon cONvEYEas.,

l'o IIIZZ whom it mln/y con/cern:

Be it known that we, THOMAS ROBINs, Jr., and EDGAR E. HERsH, citizens of the United States, and residents of the borough of Manhattan, city, county, and State of New York,

have invented certain new and useful lmprovements in Drives for Conveyers, of which the following is a speciiication accompanied by drawings.

This inventionrelates to drives for conveyers; and its objects are to improve upon the construction and eliciency of such apparatus, enabling a very long belt conveyer to be kept taut on its upper side and preventing an accumulation of slack between the driving-pulleys, thereby enabling the full driving power of each to be utilized.

Further objects of the invention will hereinafter appear; and to these ends the invention consists of apparatus for carrying out the'above objects embodying the features of construction, combinations of elements, and eneral ereinafter fully escribed and claimed in this speciication and shown in the accompanying drawings, in Which-F- Figure l is a side elevation, artly in section, of apparatus embodying t e invention. Fig. 2 is a plan. view of the same, partly in section. Fig. 3 is an enla'r ed detail side elevation of the variable ta e-u Fig. 4 is an enlar ed .plan View of the ta eeup.v

Re errmg to the drawings, A represents a suitable framework Jfor the apparatus, `upon whichy isl mounted the driving-pulley .B, which' may be `driven from any suitable source of power and is shown connected in this instance by belting C to the driven ulley D.4 Upon the shaft of the driven pu ley D is a pinion E, meshing witha gear F upon the shaft of. the pulley G, overwhich the conveyer-belt H runs. The gear F meshes with the gear I on the shaft ofthe pulley J, over-which the belt H also runs.

The conveyer-belt H is connected to be drivenin the direction of the arrows shown in Fig. 1 by means of the pulleys G and J.

`These two pulleys, as shown in the drawings7 areconstructed with the'same original diameter, but the working diameter of the pulley Specification of Letters Patent.

Applicationled November 17, 1903. Serial No. 181.516.

preferably made slightly greater than. that of the pulley G by any suitable meansn l Patented Aug. 14,1906.

as, for instance, by the use of rubber lagging K, suitably riveted or otherwise securedto the periphery of the pulley.' In ractice there may be two plies Of-lagging on the pulley G and three plies of lagging on the pulley J, so that the working diameter of the pulley J may be about one-quarter of an inch greater than that of G. In addition to the driving-pulleys G and J of different diameters a variable take-u is provided, shown in this instance as consisting of frames L and O, the slides P of which are rigidly connected at their under sides by the frameworkQ. The tail-pulley R in this instance has its bearings, as shown, in the boXes on the slides P. To the frame L are secured connectors S, which may-tbe of wire'rope,

assing over the pulleys T and secured to a eavy weight U. By this combined arrangen ment lof ulleys G and J of different diam- The strain on the belt while starting and stopping and while running is kept equalized, and yet the slack is at all times taken up without undue` strain being putupon the belt. It is preferable to use two tandem pulleys G and J in order to get4 the large amount of belt contact necessary for a drive of this kind, and the increased diameter of the pulley J tending tedrive the belt slightly faster than the smaller pulley G aids in keeping the belt tight between the pulleys. Instead oi using the lagging as described a similar result may be accomplished by varying the toothed gearing,so that the pulley J will rotate at a slightly-greater speed than the pulley G. It wouldA also'be possible to have the ulley J made to a'special size, so as to be s ightly larger than the pulley G.

Obviously some features of tlns invention may be used without others and the invenftion may be embodied in widelyyvarying orms.

Therefore, without limiting the invention K to the construction shown and described n or enumerating equivalents, We claim, and desire to obtain by Letters Patent7 the following:

1. The combination with a conveyer-belt. of two drive-pulleys over Which thebelt runs, one having Greater peripheral speed than the other, for substantially the urposes setforth.

2. The combination wit a oonveyer-bclt,

of a freely-movable slide a tail-pulley mountforth.

3. The combination with a conveyer-belt, of tWo drivepulleys over which the conveyerbelt runs, one being of -larger diameter than the other, and rneans for keeping the upper side of the conveyer taut, for substantially the purposes set forth.

4. The combination with a conve er-belt, of two drive-pulleys arranged in tan( em over which the conveyer-belt runs, one of said pulleys having greater peripheral speed than upper side ofthe belt taut, for substantially the purposes set forth. Y

5. The combination with a conveyer-belt, of. a plurality of drive-pulleys over which the belt runs1 the forward pulley and the mechanisnifor imparting rotation thereto being adapted to roduoe a slightly greater peripheral speed tlian the rear pulley and mechanism for im arting rotation thereto, for substantially t e purposes set forth.

In testimony whereof' We have signed this specification in the presence of two subscribing witnesses.

V'l`HOl\/[AS ROBINS, J R. EDGAR E. HERSH. Witnesses as to Thomas Robins, Jr.:

EMU, CHAs. EGER, Il. G. OGDEN, Jr. Witnesses as to Edgar E. Hersh:

H. G. OGDEN, Jr., H. L. OBERTENFFER. 

